PowerReadDCDefaultIndex

// POWRPROF.dll
#include <windows.h>

DWORD PowerReadDCDefaultIndex(
    HKEY RootPowerKey,   // optional
    const GUID* SchemePersonalityGuid,
    const GUID* SubGroupOfPowerSettingsGuid,   // optional
    const GUID* PowerSettingGuid,
    DWORD* DcDefaultIndex
);

<DllImport("POWRPROF.dll", ExactSpelling:=True)>
Public Shared Function PowerReadDCDefaultIndex(
    RootPowerKey As IntPtr,   ' HKEY optional
    ByRef SchemePersonalityGuid As Guid,   ' GUID*
    SubGroupOfPowerSettingsGuid As IntPtr,   ' GUID* optional
    ByRef PowerSettingGuid As Guid,   ' GUID*
    <Out> ByRef DcDefaultIndex As UInteger   ' DWORD* out
) As UInteger
End Function

' RootPowerKey : HKEY optional
' SchemePersonalityGuid : GUID*
' SubGroupOfPowerSettingsGuid : GUID* optional
' PowerSettingGuid : GUID*
' DcDefaultIndex : DWORD* out
Declare PtrSafe Function PowerReadDCDefaultIndex Lib "powrprof" ( _
    ByVal RootPowerKey As LongPtr, _
    ByVal SchemePersonalityGuid As LongPtr, _
    ByVal SubGroupOfPowerSettingsGuid As LongPtr, _
    ByVal PowerSettingGuid As LongPtr, _
    ByRef DcDefaultIndex As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

PowerReadDCDefaultIndex = ctypes.windll.powrprof.PowerReadDCDefaultIndex
PowerReadDCDefaultIndex.restype = wintypes.DWORD
PowerReadDCDefaultIndex.argtypes = [
    wintypes.HANDLE,  # RootPowerKey : HKEY optional
    ctypes.c_void_p,  # SchemePersonalityGuid : GUID*
    ctypes.c_void_p,  # SubGroupOfPowerSettingsGuid : GUID* optional
    ctypes.c_void_p,  # PowerSettingGuid : GUID*
    ctypes.POINTER(wintypes.DWORD),  # DcDefaultIndex : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('POWRPROF.dll')
PowerReadDCDefaultIndex = Fiddle::Function.new(
  lib['PowerReadDCDefaultIndex'],
  [
    Fiddle::TYPE_VOIDP,  # RootPowerKey : HKEY optional
    Fiddle::TYPE_VOIDP,  # SchemePersonalityGuid : GUID*
    Fiddle::TYPE_VOIDP,  # SubGroupOfPowerSettingsGuid : GUID* optional
    Fiddle::TYPE_VOIDP,  # PowerSettingGuid : GUID*
    Fiddle::TYPE_VOIDP,  # DcDefaultIndex : DWORD* out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "powrprof")]
extern "system" {
    fn PowerReadDCDefaultIndex(
        RootPowerKey: *mut core::ffi::c_void,  // HKEY optional
        SchemePersonalityGuid: *const GUID,  // GUID*
        SubGroupOfPowerSettingsGuid: *const GUID,  // GUID* optional
        PowerSettingGuid: *const GUID,  // GUID*
        DcDefaultIndex: *mut u32  // DWORD* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("POWRPROF.dll")]
public static extern uint PowerReadDCDefaultIndex(IntPtr RootPowerKey, ref Guid SchemePersonalityGuid, IntPtr SubGroupOfPowerSettingsGuid, ref Guid PowerSettingGuid, out uint DcDefaultIndex);
"@
$api = Add-Type -MemberDefinition $sig -Name 'POWRPROF_PowerReadDCDefaultIndex' -Namespace Win32 -PassThru
# $api::PowerReadDCDefaultIndex(RootPowerKey, SchemePersonalityGuid, SubGroupOfPowerSettingsGuid, PowerSettingGuid, DcDefaultIndex)

#uselib "POWRPROF.dll"
#func global PowerReadDCDefaultIndex "PowerReadDCDefaultIndex" sptr, sptr, sptr, sptr, sptr
; PowerReadDCDefaultIndex RootPowerKey, varptr(SchemePersonalityGuid), varptr(SubGroupOfPowerSettingsGuid), varptr(PowerSettingGuid), varptr(DcDefaultIndex)   ; 戻り値は stat
; RootPowerKey : HKEY optional -> "sptr"
; SchemePersonalityGuid : GUID* -> "sptr"
; SubGroupOfPowerSettingsGuid : GUID* optional -> "sptr"
; PowerSettingGuid : GUID* -> "sptr"
; DcDefaultIndex : DWORD* out -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

#uselib "POWRPROF.dll"
#cfunc global PowerReadDCDefaultIndex "PowerReadDCDefaultIndex" sptr, var, var, var, var
; res = PowerReadDCDefaultIndex(RootPowerKey, SchemePersonalityGuid, SubGroupOfPowerSettingsGuid, PowerSettingGuid, DcDefaultIndex)
; RootPowerKey : HKEY optional -> "sptr"
; SchemePersonalityGuid : GUID* -> "var"
; SubGroupOfPowerSettingsGuid : GUID* optional -> "var"
; PowerSettingGuid : GUID* -> "var"
; DcDefaultIndex : DWORD* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; DWORD PowerReadDCDefaultIndex(HKEY RootPowerKey, GUID* SchemePersonalityGuid, GUID* SubGroupOfPowerSettingsGuid, GUID* PowerSettingGuid, DWORD* DcDefaultIndex)
#uselib "POWRPROF.dll"
#cfunc global PowerReadDCDefaultIndex "PowerReadDCDefaultIndex" intptr, var, var, var, var
; res = PowerReadDCDefaultIndex(RootPowerKey, SchemePersonalityGuid, SubGroupOfPowerSettingsGuid, PowerSettingGuid, DcDefaultIndex)
; RootPowerKey : HKEY optional -> "intptr"
; SchemePersonalityGuid : GUID* -> "var"
; SubGroupOfPowerSettingsGuid : GUID* optional -> "var"
; PowerSettingGuid : GUID* -> "var"
; DcDefaultIndex : DWORD* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	powrprof = windows.NewLazySystemDLL("POWRPROF.dll")
	procPowerReadDCDefaultIndex = powrprof.NewProc("PowerReadDCDefaultIndex")
)

// RootPowerKey (HKEY optional), SchemePersonalityGuid (GUID*), SubGroupOfPowerSettingsGuid (GUID* optional), PowerSettingGuid (GUID*), DcDefaultIndex (DWORD* out)
r1, _, err := procPowerReadDCDefaultIndex.Call(
	uintptr(RootPowerKey),
	uintptr(SchemePersonalityGuid),
	uintptr(SubGroupOfPowerSettingsGuid),
	uintptr(PowerSettingGuid),
	uintptr(DcDefaultIndex),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function PowerReadDCDefaultIndex(
  RootPowerKey: THandle;   // HKEY optional
  SchemePersonalityGuid: PGUID;   // GUID*
  SubGroupOfPowerSettingsGuid: PGUID;   // GUID* optional
  PowerSettingGuid: PGUID;   // GUID*
  DcDefaultIndex: Pointer   // DWORD* out
): DWORD; stdcall;
  external 'POWRPROF.dll' name 'PowerReadDCDefaultIndex';

result := DllCall("POWRPROF\PowerReadDCDefaultIndex"
    , "Ptr", RootPowerKey   ; HKEY optional
    , "Ptr", SchemePersonalityGuid   ; GUID*
    , "Ptr", SubGroupOfPowerSettingsGuid   ; GUID* optional
    , "Ptr", PowerSettingGuid   ; GUID*
    , "Ptr", DcDefaultIndex   ; DWORD* out
    , "UInt")   ; return: DWORD

●PowerReadDCDefaultIndex(RootPowerKey, SchemePersonalityGuid, SubGroupOfPowerSettingsGuid, PowerSettingGuid, DcDefaultIndex) = DLL("POWRPROF.dll", "dword PowerReadDCDefaultIndex(void*, void*, void*, void*, void*)")
# 呼び出し: PowerReadDCDefaultIndex(RootPowerKey, SchemePersonalityGuid, SubGroupOfPowerSettingsGuid, PowerSettingGuid, DcDefaultIndex)
# RootPowerKey : HKEY optional -> "void*"
# SchemePersonalityGuid : GUID* -> "void*"
# SubGroupOfPowerSettingsGuid : GUID* optional -> "void*"
# PowerSettingGuid : GUID* -> "void*"
# DcDefaultIndex : DWORD* out -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。